From d8cbc2175dc4f9757d69b120e0c85251b6d015d7 Mon Sep 17 00:00:00 2001
From: Carl Hetherington <cth@carlh.net>
Date: Fri, 6 Dec 2024 21:28:08 +0100
Subject: Assert if we're about to set up 0 encoding threads.

---
 src/lib/j2k_encoder.cc | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/lib/j2k_encoder.cc b/src/lib/j2k_encoder.cc
index 15046b51d..b416f921d 100644
--- a/src/lib/j2k_encoder.cc
+++ b/src/lib/j2k_encoder.cc
@@ -365,6 +365,7 @@ void
 J2KEncoder::remake_threads(int cpu, int gpu, list<EncodeServerDescription> servers)
 {
 	LOG_GENERAL("Making threads: CPU=%1, GPU=%2, Remote=%3", cpu, gpu, servers.size());
+	DCPOMATIC_ASSERT((cpu + gpu + servers.size()) > 0);
 
 	boost::mutex::scoped_lock lm (_threads_mutex);
 	if (_ending) {
-- 
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